/Engine/Plugins/Importers/USDImporter/Source/UnrealUSDWrapper/Public/UnrealUSDWrapper.h
Get the singleton, persistent stage used as a clipboard for prim cut/copy/paste operations. WARNING: This stage may remain open indefinitely! If you use this directly, be aware that there may be unintended consequences (e.g. a sublayer added to this stage may never fully close)
static [UE::FUsdStage](API\Plugins\UnrealUSDWrapper\UsdWrappers\FUsdStage) GetClipboardStage()